+ /**
+ * Paints the signal into a QGLWidget.
+ * @param widget the QGLWidget to paint into.
+ * @param rect the rectangular area to draw the trace into.
+ * @param scale the scale in femtoseconds per pixel.
+ * @param offset the time to show at the left hand edge of
+ * the view in femtoseconds.
+ **/
+ void paint(QGLWidget &widget, const QRect &rect, uint64_t scale,
+ int64_t offset);
+
+private:
+ static void paint_lines(Point2F *points, int count);